/*
 * Rule.java
 *
 * Created on 3 de septiembre de 2006, 02:27 PM
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package taladro.vista.proyecto;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.Toolkit;
import javax.swing.JComponent;

/**
 *
 * @author Administrator
 */
public class Rule extends JComponent {
    public static final int INCH = Toolkit.getDefaultToolkit().
            getScreenResolution();
    public static final int HORIZONTAL = 0;
    public static final int VERTICAL = 1;
    public static final int SIZE = 35;

    public int orientation;
    public boolean isMetric;
    private float increment;
    private float units;
    private double zoomFactor;

    public Rule(int o, boolean m) {
        orientation = o;
        isMetric = m;
        zoomFactor = 1D;
        setIncrementAndUnits();
    }

    public void setIsMetric(boolean isMetric) {
        this.isMetric = isMetric;
        setIncrementAndUnits();
        repaint();
    }

    private void setIncrementAndUnits() {
        if (isMetric) {
            units = ((float)INCH / (float)2.54); // dots per centimeter
            increment = units;
        } else {
            units = INCH;
            increment = units / 2;
        }
        increment = increment * (float)zoomFactor;
    }

    public boolean isMetric() {
        return this.isMetric;
    }

    public float getIncrement() {
        return increment;
    }

    public void setPreferredHeight(int ph) {
        setPreferredSize(new Dimension(SIZE, ph));
    }

    public void setPreferredWidth(int pw) {
        setPreferredSize(new Dimension(pw, SIZE));
    }

    protected void paintComponent(Graphics g) {
        Rectangle drawHere = g.getClipBounds();

        // Fill clipping area with dirty brown/orange.
        g.setColor(new Color(230, 163, 4));
        g.fillRect(drawHere.x, drawHere.y, drawHere.width, drawHere.height);

        // Do the ruler labels in a small font that's black.
        g.setFont(new Font("SansSerif", Font.PLAIN, 10));
        g.setColor(Color.black);

        // Some vars we need.
        int end = 0;
        int start = 0;
        int tickLength = 0;
        String text = null;

        // Use clipping bounds to calculate first and last tick locations.
        if (orientation == HORIZONTAL) {
            start = Math.round((drawHere.x / increment) * increment);
            end = Math.round((((drawHere.x + drawHere.width) / increment) + 1)
                  * increment);
        } else {
            start = Math.round((drawHere.y / increment) * increment);
            end = Math.round((((drawHere.y + drawHere.height) / increment) + 1)
                  * increment);
        }

        // Make a special case of 0 to display the number
        // within the rule and draw a units label.
        if (start == 0) {
            text = Integer.toString(0) + (isMetric ? " cm" : " in");
            tickLength = 10;
            if (orientation == HORIZONTAL) {
                g.drawLine(0, SIZE-1, 0, SIZE-tickLength-1);
                g.drawString(text, 2, 21);
            } else {
                g.drawLine(SIZE-1, 0, SIZE-tickLength-1, 0);
                g.drawString(text, 9, 10);
            }
            text = null;
            start = Math.round(increment);
        }

        // ticks and labels
        int j=1;
        for ( int i = start; i < end+2; i = Math.round(( (float)++j * increment)) ) {
//            if (i % Math.round(units) == 0)  {
                tickLength = 10;
                text = Integer.toString(j);
/*            } else {
                tickLength = 7;
                text = null;
            }*/

            if (tickLength != 0) {
                if (orientation == HORIZONTAL) {
                    g.drawLine(i, SIZE-1, i, SIZE-tickLength-1);
                    if (text != null)
                        g.drawString(text, i-3, 21);
                } else {
                    g.drawLine(SIZE-1, i, SIZE-tickLength-1, i);
                    if (text != null)
                        g.drawString(text, 9, i+3);
                }
            }
        }
    }
    
    public double getZoomFactor() {
        return zoomFactor;
    }
    
    public void setZoomFactor(double zoomFactor) {
        this.zoomFactor = zoomFactor;
        this.setIncrementAndUnits();
        repaint();
        revalidate();
        repaint();
    }

}